JP3132913U - Electronics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the thickness while maintaining shield characteristics and assembly strength.
An assembly 3 is configured by combining a wiring board 2 and a board mounting frame member 4, and an upper case body 6 is combined with the assembly 3 by an engagement structure of a fitting convex piece 19 and an engagement hole 31. The lower case body 7 is directly combined with the upper case body 6 by the engagement structure of the engagement beat 32 and the engagement convex edge 39 to constitute the shield case 5. Thereby, even if a thin plate material is used, a strong shield case structure is formed and stable shield characteristics are exhibited, and the height of the board mounting frame member which does not require a mounting structure of the lower case body is reduced, and the entire structure is reduced. Thinning and miniaturization can be achieved.
[Selection] Figure 1

Description

  The present invention relates to an electronic device, and more particularly to a small and thin electronic device in which a wiring board is housed in a shield case such as an electronic tuner or a circuit module provided in a receiver, an audio device, or the like.

  For example, electronic devices such as electronic tuners are provided in main devices such as receivers and television receivers, but electronic components and integrated circuit elements mounted on a wiring board are stable without being affected by external electromagnetic waves. The wiring board is accommodated in the shield case so that a predetermined operation is performed. In an electronic device, generally, a substantially frame-shaped board mounting frame member (chassis) is formed of a thin metal plate, and a wiring board on which electronic components, connectors, and the like are mounted is assembled to the board mounting frame member to constitute an assembly. . In an electronic device, a thin plate generally forms an upper case body and a lower case body each having a generally shallow dish shape, and the upper case body and the lower case body are combined with a board mounting frame member to cover the assembly. A case is formed (see, for example, Patent Document 1 and Patent Document 2).

By the way, electronic devices are required to have higher functions, more functions, or smaller and thinner in accordance with the higher functions, more functions, or smaller sizes of the main device, and various measures are being taken. For example, Patent Document 3 discloses a circuit module device comprising a shield frame attached so as to surround an electrical component mounted on a main surface of a substrate and a shield cover combined so as to cover an upper portion of the shield frame. Is disclosed. The circuit module device forms a tongue-shaped mounting piece having a convex portion on the outer peripheral portion on the shield frame side, and forms a tongue-shaped mounting piece having an engagement hole on the outer peripheral portion on the shield cover side. The shield cover is attached to the shield frame by relatively engaging the engagement holes with the engagement holes. In the circuit module device, the substrate functions as a bottom plate member in a combined state, so that the lower case body is not required and the circuit module device can be thinned.
Japanese Patent Laid-Open No. 10-284853 JP 11-296637 A JP 2006165201 A

  By the way, in electronic equipment, when trying to cope with small size and thinness, it is difficult to form a strong attachment part while using a thin plate material for the metal plate of the material forming the shield case, and stable shielding characteristics are obtained. There was a problem that it could not be secured. In an electronic device, for example, the upper case body and the lower case body can be combined and then integrated by soldering or the like, but there is a problem that adjustment and maintenance after assembly are difficult.

  In the circuit module device disclosed in Patent Document 3 described above, since the substrate also serves as the bottom plate member, circuit patterns and electronic components that are affected by external electromagnetic waves cannot be mounted on the bottom surface side, which is large in terms of substrate design. In addition to being restricted, there is a problem that substantial reduction in size and thickness cannot be achieved. In the circuit module device, there is a problem that a stable shield characteristic is not achieved.

  Accordingly, the present invention has been proposed for the purpose of providing an electronic device that maintains a shielding characteristic and mechanical strength and is reduced in size and thickness.

  An electronic device according to the present invention that achieves the above-described object includes a wiring board, a board mounting frame member, an upper case body, and a lower case body. In an electronic device, a wiring board is formed with predetermined wiring patterns and lands to mount electronic components, and attachment through holes are formed at a plurality of locations. In the electronic apparatus, the board mounting frame member is formed with a plurality of engaging protrusions formed with a plurality of fitting protrusions opposed to the mounting through-holes and projecting the tips outwardly on the outer periphery. A piece is formed. In an electronic device, an upper case body includes an upper portion of an assembly in which a wiring board and a board mounting frame member are combined, a ceiling portion that covers an outer peripheral portion, and an outer peripheral standing wall portion. A plurality of engagement holes facing the mating convex pieces are formed, and a plurality of engagement beats are formed on the outer surface. In the electronic device, the lower case body includes a bottom plate portion and an outer peripheral standing wall portion covering the lower portion and the outer peripheral portion of the assembly, and a plurality of engaging convex portions opposed to the engaging beat of the upper case body on the outer peripheral standing wall portion Is formed.

  In an electronic device, a wiring board and a board mounting frame member are integrated by fitting an opposing mounting through hole and a fitting convex to constitute an assembly. In the electronic device, the upper case body is held in the combined state by engaging the engaging convex piece on the board mounting frame member side and the engaging hole on the upper case body side with respect to the assembly. In the electronic device, the lower case body is combined with the upper case body by fitting the opposing engagement beat and the engagement convex portion to cover the periphery of the assembly.

  In electronic equipment, mechanical strength is achieved by combining the wiring board and board mounting frame member through a simple operation of fitting the opposing mounting through-holes and fitting protrusions, and the wiring board also functions as a case structural component. Is secured. In electronic equipment, the tip of the fitting protrusion that penetrates the mounting through hole is soldered at the same time as the connector and the terminal of the electronic component, and fixed to a dummy land, etc. Can be configured. In an electronic device, the upper case body is combined with the board mounting frame member of the assembly by covering the upper part of the wiring board by a simple operation of fitting the engagement hole facing the engagement convex piece. The lower case body is engaged with the engaging beat and the engaging convex portion, and the lower portion of the wiring board is covered and combined. Therefore, in an electronic device, a stable shield characteristic is maintained by covering the entire wiring board with the upper case body and the lower case body. Since the electronic device has a structure in which the upper case body and the lower case body are directly combined, the thickness of the board mounting frame member can be reduced while the strong case structure is formed. In the electronic device, since the lower case body can be removed from the upper case body, adjustment and maintenance can be achieved with a simple response even after assembly.

  According to the electronic apparatus according to the present invention configured as described above, an assembly is configured by combining the wiring board and the board mounting frame member, and the upper case body is combined with the assembly, and the lower case body is combined with the upper case body. The board mounting frame member height that does not require the mounting structure of the lower case body while having a strong shielding case structure even with the use of a thin plate material and providing stable shielding characteristics. As a result, the overall thickness and size can be reduced.

  Hereinafter, an electronic tuner 1 shown as an embodiment of the present invention will be described in detail with reference to the drawings. The electronic tuner 1 has the same basic functions and configuration as a conventional general electronic tuner, is provided in a main device such as a receiver or a television receiver, and receives a broadcast program or an appropriate high-frequency signal (received by an antenna). RF signal) is processed, and the RF signal is transmitted from the antenna. As shown in FIGS. 1 and 2, the electronic tuner 1 includes a wiring board 2, a board mounting frame member 4 that is integrated with the wiring board 2 and forms an assembly 3, and an upper case that forms a shield case 5. A body 6 and a lower case body 7, a connector 8, and a front panel member 9 are provided. As shown in FIG. 1, the electronic tuner 1 houses the assembly 3 in a shield case 5 by electromagnetically covering it, and the connector 8 is exposed on the side surface.

  In the electronic tuner 1, the wiring substrate 2 has a substantially horizontally long rectangular shape and is not illustrated, but a predetermined circuit pattern, lands, and the like are formed on the front and back main surfaces, and a resistor constituting an RF signal processing circuit, a control circuit, and the like. Electronic components such as capacitors and electrical components, integrated circuit elements, and the like are mounted. As shown in FIG. 2, the wiring substrate 2 is formed with slits 10 and 10 having a predetermined length and a predetermined groove width in opposite directions from both ends in the longitudinal direction along one side portion in the width direction. . In the wiring board 2, a side portion divided by the slits 10 and 10 is configured as a connector assembly portion 11, and the connector assembly portion 11 protrudes from the shield case 5 and a connector 8 as will be described in detail later. Assemble.

  As shown in FIG. 2, the wiring board 2 has a plurality of mounting penetrations at predetermined intervals along the vicinity of both ends in the longitudinal direction and the vicinity of the side edge facing the connector assembly 11. A hole 12 is formed. A similar mounting through hole 12 is formed in the wiring board 2 at a substantially central portion. In the wiring board 2, these mounting through holes 12 integrate the board mounting frame member 4 combined on the upper surface, as will be described in detail later, in the vicinity and center of each side edge except for the connector assembly 11. The mounting hole is configured.

  The electronic tuner 1 includes a first side surface portion 13 and a second side surface portion 14 in which the substrate mounting frame member 4 is opposed to the length direction by a thin metal plate as shown in FIG. 2, and the first side surface portion 13 and the second side surface portion. The third side surface portion 15 and the fourth side surface portion 16 that connect the first side surface portion 13 and the substantially central portion of the second side surface portion 14 and the third side surface portion 15 and the fourth side surface portion 16 that face each other in the width direction. And a beam portion 17 parallel to the. The board mounting frame member 4 is formed having an outer frame size substantially equal to the area surrounded by the mounting through holes 12 of the wiring board 2 described above.

  As will be described later, the board mounting frame member 4 has a first side surface portion 13 facing the connector assembly portion 11 in a state of being combined with the wiring substrate 2 so that the width in the height direction is slightly narrower than the other side surface portions. It is formed. The board mounting frame member 4 has fitting projections 18 and 18 in the height direction at portions located on both sides of the first side surface portion 13 and in the vicinity of the connection portion with the third side surface portion 15 and the fourth side surface portion 16. Are integrally formed. These fitting projections 18 are fitted into the aforementioned slits 10 in a state where the board mounting frame member 4 is combined with the wiring board 2. The fitting convex portions 18 are formed with fitting convex pieces 19 that protrude outward.

  As shown in FIG. 3, the fitting convex piece 19 is formed by bending a tongue piece-like uncut piece formed by an upward U-shaped notch formed in the fitting convex portion 18 so as to protrude outward. It is formed in the fitting convex part 18 as a wedge-shaped convex piece. The board mounting frame member 4 is also formed with fitting convex portions 18, which are not shown in the figure, on the second side surface portion 14 facing the first side surface portion 13. .

  The board mounting frame member 4 is formed integrally with a plurality of fitting protrusions 20 protruding from the side edges 13 to 16 and the lower edge of the beam 17. Each fitting protrusion 20 is formed in a cross-sectional shape that is slightly larger than the thickness of the wiring board 2 and substantially the same as the opening shape of the mounting through hole 12 described above, and the board mounting frame member 4 is combined with the wiring board 2. In this state, each mounting through hole 12 is opposed. Each fitting protrusion 20 is fitted by pushing the board attachment frame member 4 into the wiring board 2 so that the respective front end portions penetrate the bottom side as shown in FIG. Each fitting protrusion 20 is soldered to a ground pattern that omits the details formed on the bottom surface side of the wiring board 2 at each of the penetrating end portions thereof, for example, in a soldering process of an electronic component or the like. The board mounting frame member 4 is firmly fixed to the wiring board 2. Thus, the board mounting frame member 4 is grounded to the wiring board 2 via the fitting protrusions 20.

  The board mounting frame member 4 is integrally formed with a receiving piece portion 21 bent in the horizontal direction on the beam portion 17. As will be described later, the receiving piece portion 21 is abutted against an upper pressing piece 29 described later formed on the upper case body 6 in a state where the upper case body 6 is combined with the board mounting frame member 4. The board mounting frame member 4 is pressed to the wiring board 2 side by abutment of the upper pressing piece 29 to the receiving piece part 21 and the wiring board 2 and the upper case body 6 are connected to the ground.

  The board mounting frame member 4 is integrally formed with panel caulking convex pieces 22, 22 that are connected to the first side surface portion 13 and the second side surface portion 14 and project laterally at both ends of the third side surface portion 15. Is formed. These panel caulking convex pieces 22 are bent inward in a state where the front panel member 9 is combined with the third side surface portion 15 as will be described later, and the front panel member 9 is caulked to the third side surface portion 15. So that

  The board mounting frame member 4 is integrally formed with a connector caulking convex piece 23 protruding forward on the first side face 13 side of the fourth side face 16. The connector caulking convex piece 23 extends along the side surface of the connector 8 mounted on the wiring board 2 in a state where the board mounting frame member 4 is combined with the wiring board 2 as will be described later, and bends the tip portion. Thus, the connector 8 is held.

  In the electronic tuner 1, the assembly 8 is manufactured by combining the board mounting frame member 4 from above with respect to the wiring board 2 on which the connector 8 is mounted on the connector assembly portion 11 and predetermined electronic components and the like are mounted. As shown by arrow a in FIG. 3, the assembly 3 is fitted with the board mounting frame member 4 fitted with the fitting protrusions 20 formed on each part corresponding to the mounting holes 12 facing each other. To be combined. In the assembly 3, the fitting convex portion 18 formed on the first side surface portion 13 of the board mounting frame member 4 is fitted in the slit 10 formed on the wiring board 2 as shown by the arrow b in FIG. The fitting convex part 18 formed in the part 13 is fitted to the side end part of the wiring board 2. As shown in FIG. 1, the assembly 3 has the first side surface portion 13 facing the back surface of the connector 8. However, as described above, each connector pin 43 of the connector 8 is inward by narrowing the width. To be drawn into.

  In the electronic tuner 1, the upper case body 6 is combined with the assembly 3 in which the wiring board 2 and the board mounting frame member 4 are combined. As shown in FIG. 2, the upper case body 6 includes a ceiling portion 24 and a first upper outer peripheral standing wall portion 25 to a fourth upper outer peripheral standing wall portion 28 which are integrally formed by being bent at right angles from the outer peripheral edge thereof. Consists of In the upper case body 6, the ceiling portion 24 has substantially the same outer dimensions as the substrate mounting frame member 4, and the whole is formed in a rectangular shallow dish shape.

  In the upper case body 6, an upper pressing piece 29 is formed on the ceiling portion 24 so as to abut against the receiving piece portion 21 formed on the beam portion 17 of the board mounting frame member 4 in the state of being combined with the assembly 3. Yes. The upper pressing piece 29 is formed by bending downward a tongue piece-like uncut piece formed by a U-shaped cutout formed in the ceiling portion 24. The upper pressing piece 29 is formed with a protruding amount that slightly elastically deforms the distal end side in a state where the upper case body 6 is combined with the assembly 3 and accumulates elastic force. The upper pressing piece 29 holds the combined state of the assembly 3 and the upper case body 6 by the stored elastic force, and the upper case body 6 is connected to the wiring board via the board mounting frame member 4 as described above. 2 is connected to the ground.

  The upper case body 6 is formed so that the upper outer peripheral standing wall portions 25 to 28 are opposed to the side surface portions 13 to 16 of the board mounting frame member 4 and have a slightly higher height than the width dimension thereof. In the upper case body 6, the first upper outer peripheral standing wall portion 25 is formed at a height slightly lower than the other upper outer peripheral standing wall portions corresponding to the first side surface portion 13 of the board mounting frame member 4. Each connector pin 43 is pulled inward.

  The first upper outer peripheral standing wall portion 25 protrudes downward at both side portions corresponding to each fitting convex portion 18 formed on the first side surface portion 13 of the substrate mounting frame member 4 described above, and the engaging convex portion 30. , 30 are integrally formed. These engagement protrusions 30 are fitted into the above-described slits 10 formed on the wiring board 2 in a state where the upper case body 6 is combined with the assembly 3. As shown in FIG. 3, a rectangular engagement hole 31 corresponding to the fitting protrusion 19 of the board mounting frame member 4 described above is formed in the engagement protrusion 30. Each engagement hole 31 has an opening size slightly larger than the cross-sectional dimension of the fitting convex piece 19, and the fitting convex piece facing each other in a state where the upper case body 6 is combined with the assembly 3 as will be described later. 19 engages to hold the upper case body 6 to the assembly 3. In the upper case body 6, although not shown, similar engagement holes 31 are also formed in both side portions of the second upper outer peripheral standing wall portion 26 facing the first upper outer peripheral standing wall portion 25.

  As shown in FIG. 2, the upper case body 6 is divided into two strip-shaped regions in the front-rear direction by the third upper outer peripheral standing wall 27 forming a slit in the height direction that opens at the lower end edge at a substantially central portion. The engaging beats 32 are formed by extrusion in the respective regions. Each engagement beat 32 is formed of an arc-shaped horizontal convex portion projecting with a predetermined projection amount outwardly formed at the same height position, and is combined with the upper case body 6 as will be described later. A holding structure for the lower case body 7 is configured. In the upper case body 6, the engagement beats 32 are similarly formed on the fourth upper outer peripheral standing wall portion 28 that faces the third upper outer peripheral standing wall portion 27.

  In the electronic tuner 1, the upper case body 6 is pushed into the assembly 3 in a state where the upper outer peripheral standing wall portions 25 to 28 facing the side surface portions 13 to 16 of the board mounting frame member 4 are aligned and combined. Combination is performed by operating. As shown by arrow c in FIG. 3, the upper case body 6 has the engagement protrusions 30 formed on the first upper outer peripheral standing wall portion 25 and the second upper outer peripheral standing wall portion 26, and the slits 10 and side edge portions of the wiring board 2 facing each other. Are fitted on the outside of the fitting projection 18 of the board mounting frame member 4 fitted to the slit 10 and the side edge. The upper case body 6 is assembled by the first upper outer peripheral standing wall portion 25 drawing the connector pin 43 of the connector 8 into the inside and covering the upper portion of the assembly 3 and the outer peripheral portion.

  The upper case body 6 is pushed into the assembly 3 while elastically deforming the fitting convex piece 19 formed on the fitting convex portion 18 inward, and thereby the engaging convex portion 30 as shown by an arrow d in FIG. The fitting convex piece 19 on the board mounting frame member 4 side engages with the engaging hole 31 formed in the above. The upper case body 6 is subjected to the elastic force accumulated from the fitted fitting convex piece 19 against the upper edge of the engagement hole 31 and is also subjected to the elastic force from the upper pressing piece 29 as described above. Thus, the engagement state of the fitting convex piece 19 is reliably maintained at the opening edge of the engagement hole 31.

  In the electronic tuner 1, for example, when adjustment or the like is necessary in an operation confirmation process performed after the assembly process, or when performing maintenance or the like, the shield case 5 needs to be removed. The upper case body 6 pushes each fitting convex piece 19 with an appropriate jig from the outside of the upper outer peripheral standing wall portions 25 and 26 to release the engagement state with the engagement hole 31. Can be easily removed. The upper case body 6 can improve the workability of the adjustment process and maintenance by the above-described configuration, and can be easily recombined.

  In the electronic tuner 1, the fitting convex piece 19 is cut and raised on the substrate mounting frame member 4 side and the engagement hole 31 is formed on the upper case body 6 side, but the press mold structure is not complicated. For example, an engagement hole may be formed on the board mounting frame member 4 side and a fitting convex piece 19 may be formed on the upper case body 6 side. Moreover, in the electronic tuner 1, although the fitting convex piece 19 was formed by the U-shaped notch formed in the fitting convex part 18, for example, the wedge-shaped convex part is formed by extrusion and fitting having an equivalent function You may make it form a convex part.

  In the electronic tuner 1, the upper case body 6 and the lower case body 7 are assembled by directly combining the lower case body 7 with the upper case body 6 covering the upper and outer peripheral parts of the assembly 3 by the above-described process. A shield case 5 that covers the entire solid 3 is configured. The lower case body 7 is also composed of a bottom plate portion 33 and a first lower outer peripheral standing wall portion 34 to a fourth lower outer peripheral standing wall portion 37 that are formed at a right angle from the outer peripheral edge thereof as shown in FIG. The lower case body 7 also has a bottom plate portion 33 having substantially the same outer dimensions as the substrate mounting frame member 4 and is formed in a rectangular shallow dish shape as a whole.

  As shown in FIG. 2, the lower case body 7 has a first lower outer peripheral standing wall 34 that is cut out in a region that is substantially equal to the length of the connector 8, and the bottom plate portion 33 is disposed on the front side corresponding to the cutout portion. The connector receiving portion 38 is integrally formed so as to protrude in a convex shape. As shown in FIG. 1, the connector receiving portion 38 is connected to the connector assembly portion 11 of the wiring board 2 and the connector assembly in a state where the lower case body 7 is combined with the assembly 3 via the upper case body 6 as will be described later. It acts as a portion that supports the front bottom surface of the connector 8 protruding from the attachment portion 11. The connector receiving portion 38 holds the connector 8 firmly so as to suppress grabbing when the plug or the like is attached or detached so that the occurrence of disconnection or the like at the connecting portion of the wiring board 2 is reduced.

  The lower case body 7 is configured as a strip-like standing wall in which the first lower outer peripheral standing wall portion 34 is left uncut on both sides, and the second lower outer peripheral standing wall portion 35 facing the first lower outer peripheral standing wall portion 34 is the bottom plate portion 33. Are formed as a plurality of strip-like standing walls by forming a plurality of slits in the height direction that open from the continuous portion to the upper edge. In the lower case body 7, the first lower outer peripheral standing wall portion 34 and the second lower outer peripheral standing wall portion 35 are formed in a substantially semicircular arc shape in which each strip portion is convex inward as shown in FIG. 6.

  In the lower case body 7, the first lower outer peripheral standing wall portion 34 and the second lower outer peripheral standing wall portion 35 are superimposed on the outer surfaces of the first upper outer peripheral standing wall portion 25 and the second upper outer peripheral standing wall portion 26 with respect to the upper case body 6. To be combined. The lower case body 7 is formed by forming the first lower outer peripheral standing wall portion 34 and the second lower outer peripheral standing wall portion 35 into a substantially semicircular arc-shaped strip shape as described above. The outer peripheral standing wall portion 25 and the second outer peripheral standing wall portion 26 are pressed against the outer surface of the second outer peripheral standing wall portion 26 so that the covering state of the assembly 3 is reliably maintained.

  The lower case body 7 is configured such that the third lower outer peripheral standing wall portion 27 and the fourth lower outer peripheral standing wall portion 37 are opposed to the upper case body 6 with respect to the third lower outer peripheral standing wall portion 36 and the fourth lower outer peripheral standing wall portion 37. Are combined so that they are superimposed on each other. The third lower outer peripheral standing wall portion 36 and the fourth lower outer peripheral standing wall portion 37 form a plurality of height-wise slits that open from the connecting portion of the bottom plate portion 33 to the upper edge starting from a predetermined height position. Thus, the upper part is configured as a standing wall divided into a plurality of, for example, three strip-like parts.

  As shown in FIG. 6, the third lower outer peripheral standing wall portion 36 and the fourth lower outer peripheral standing wall portion 37 are respectively connected by curving the end portions of the respective strip-like portions into a substantially semicircular arc shape that protrudes inward. The joint convex edge part (engagement convex part) 39 is formed integrally. Each engagement convex edge 39 has a third lower outer peripheral standing wall 36 so that the height of the apex is a position over the above-described engagement beat 32 in a state where the lower case body 7 is combined with the upper case body 6. The fourth lower outer peripheral standing wall portion 37 is formed respectively. Each engagement convex edge 39 is engaged with the engagement beat 32 as will be described later, thereby maintaining the combined state of the lower case body 7 and the upper case body 6 in cooperation with the engagement beat 32.

  In the lower case body 7, a lower pressing piece 40 is formed on the bottom plate portion 33 to be abutted against a ground pattern (not shown) formed on the bottom surface of the wiring board 2 in a state combined with the assembly 3 via the upper case body 6. Has been. The lower pressing piece 40 is formed by bending upward a tongue piece-like uncut piece formed by a U-shaped cutout formed in the bottom plate portion 33. The lower pressing piece 40 is formed with a protruding amount that is slightly elastically deformed at the distal end side by being abutted against the bottom surface of the wiring board 2 and accumulates elastic force.

  The lower pressing piece 40 holds the combined state of the lower case body 7 with respect to the upper case body 6 by the stored elastic force, and also connects the lower case body 7 to the wiring board 2 as described above. To do. The lower pressing piece 40 is formed on the bottom plate portion 33 so as to face the ground pattern of the wiring board 2 so that the lower case body 7 is directly connected to the wiring board 2 with the above-described shield case structure. Since the lower case body 7 and the upper case body 6 are also electrically connected to each other, the structure is not limited to this.

  In the electronic tuner 1, the lower case body 7 is aligned with the upper outer peripheral standing wall portions 25 to 28 that face the lower outer peripheral standing wall portions 34 to 37 with respect to the upper case body 6 integrated with the assembly 3. In the combined state, the pushing operation is performed to combine the shield cases 5. When the lower case body 7 is pushed in, the engagement convex edge portions 39 formed on the third lower outer peripheral standing wall portion 36 and the fourth lower outer peripheral standing wall portion 37 are formed as shown in FIG. 6 move along the outer surfaces of the third upper outer peripheral wall portion 27 and the fourth upper outer peripheral wall portion 28, respectively. As shown in FIG. 5, the engaging convex edge portion 39 engages with the opposing engaging beat 32 as shown in FIG. 5 by overcoming the engaging beat 32 while elastically deforming outward when the apex portion hits the engaging beat 32. Then, the upper case body 6 and the lower case body 7 are combined.

  The shield case 5 has a structure in which the upper case body 6 and the lower case body 7 are formed of a thin metal plate as described above and are divided into a plurality of strip-shaped portions so as to be elastically deformed when combined. In the shield case 5, it is preferable that the strip-shaped portions of the upper case body 6 and the lower case body 7 have a predetermined mechanical strength and are elastically deformed almost uniformly in order to suppress backlash in the combined state. .

  As described above, the shield case 5 is divided into two regions on the upper case body 6 side so that the mechanical strength is maintained, and the lower case body 7 side is divided into three regions. Easily cause elastic deformation evenly. The shield case 5 has a central region on the lower case body 7 side engaged with the upper case body 6 across the two regions so that the shield case 5 extends in the front-rear direction from each engagement convex edge 39 engaged with the engagement beat 32. It is configured so that a stable shield characteristic can be achieved by applying an equal elastic force to the first and second layers.

  Needless to say, the upper case body 6 and the lower case body 7 are not limited to such a structure. The upper case body 6 and the lower case body 7 are, for example, configured such that the upper case body 6 side is configured by an integral outer peripheral wall portion, and the lower case body 7 is divided into three pieces of the engaging beat 32 formed by dividing into two pieces. The two engaging convex edge portions 39 may be configured to be engaged across the central portion.

  In the shield case 5, since the lower case body 7 is directly combined with the upper case body 6 integrated with the assembly 3 as described above, a case structure having high mechanical strength even if a thin metal plate is used. Thus, the electronic tuner 1 that exhibits stable shield characteristics is configured. Since the shield case 5 has a structure that does not require the mounting structure of the lower case body 7 on the board mounting frame member 4, the height of the board mounting frame member 4 is reduced to reduce the thickness, size, and weight. The electronic tuner 1 is configured.

  The shield case 5 is assembled by a simple operation of pushing the lower case body 7 into the upper case body 6 as described above, thereby rationalizing the assembly process. The shield case 5 can be removed by a simple operation of strongly pulling the lower case body 7 from the upper case body 6 when performing adjustment, maintenance, etc., and the removal operation of the upper case body 6 from the assembly 3 described above. Together with this, it is possible to greatly improve the workability of assembly, adjustment or maintenance.

  In the electronic tuner 1, as described above, the multi-pin connector 8 mounted on the wiring board 2 is exposed from the side surface of the shield case 5. Although not described in detail, the connector 8 protrudes from a plug fitting opening 42 formed on the first side surface in the insulating housing 41 so that a large number of pin terminals 43 are supported at the base ends and connected to the pin terminals 43. The connecting terminal 44 protrudes from the second side surface. The connector 8 is mounted on the connector assembly 11 formed on the wiring board 4 as described above, and the connection terminal 44 is drawn into the shield case 5 to be electrically connected to the wiring board 4.

  In the electronic tuner 1, the size of the housing 41 of the connector 8 is determined according to the number of pins of the pin terminal 43, and the number of pins increases with the increase in functionality and functionality. In the electronic tuner 1, since the shield case 5 is thinned by the above-described structure, a space in the height direction can be secured. Therefore, in the electronic tuner 1, the height (thickness) is slightly increased by using a part of the reserved space as compared with the case where only the thinning is intended. As a result, it is possible to reduce the thickness and reduce the size significantly.

  Although details are omitted, the connector 8 divides the interior of the housing 41 into an upper space portion 45 and a lower space portion 46 as shown in FIG. 7, and a plurality of pin terminals 43U and connection terminals 44U are provided in the upper space portion 45. By accommodating a large number of pin terminals 43L and connection terminals 44L in the lower space 46, the multi-pin specification is achieved. As shown in FIG. 1, the connector 8 is electrically connected by connecting the connection terminals 44 </ b> U provided in the upper space portion 45 to the upper surface side of the wiring board 2, and the connection terminals 44 </ b> L provided in the lower space portion 46. Is led to the bottom surface side of the wiring board 2 so as to be electrically connected.

  The connector 8 accommodates pin terminals 43U and 43L (connection terminals 44U and 44L) side by side in the upper space portion 45 and the lower space portion 46, respectively, but as shown in FIG. 43L (connection terminals 44U, 44L) are arranged in a staggered manner in the upper space portion 45 and the lower space portion 46 with their positions shifted in the lateral direction. In the connector 8, the pin terminals 43U and 43L (connection terminals 44U and 44L) are insulated in the vertical and horizontal directions by arranging them in a staggered manner in this manner, so that a sufficient distance is maintained to maintain the coupling characteristics with the plug. Can be provided.

  The electronic tuner 1 is provided with the connector 8 described above, so that it can be multifunctional and highly functional while maintaining a small size and a thin shape. In the electronic tuner 1, for example, a lock mechanism that locks a plug to be connected can be provided by reducing the size of the connector 8.

  In the electronic tuner 1, the front panel member 9 is combined with the board mounting frame member 4 as a pre-process of the above-described combining process of the shield case 5. The front panel member 9 is a member to be combined with the third side surface portion 15 of the board mounting frame member 4. Although not described in detail, a pair of mounting holes 47 are formed on both sides in the longitudinal direction so as to be spaced apart from each other. The panel caulking convex piece 22 on the board mounting frame member 4 side described above is passed through the mounting hole 47. The front panel member 9 is integrated with the third side surface portion 15 of the board mounting frame member 4 by caulking and bending the front end portion of each panel caulking convex piece 22.

  As shown in FIG. 2, the front panel member 9 faces the connector caulking convex piece 23 formed on the fourth side surface portion 16 of the board mounting frame member 4 in a state where it is combined with the board mounting frame member 4 on the front side thereof. A connector caulking convex piece 48 is integrally formed. The connector caulking convex piece 48 extends to the side surface of the connector 8 mounted on the wiring board 2 in a state in which the front panel member 9 is combined with the assembly 3, and the board mounting frame member 4 is bent by bending the tip. The connector 8 is held together with the side connector caulking convex piece 23.

  In the electronic tuner 1, as described above, the pin terminals 43 and the connection terminals 44 are arranged in a staggered manner in the vertical direction to provide a connector 8 that is reduced in size and increased in number of pins. Multifunctionality and high functionality are achieved. In the electronic tuner 1, a stable shield characteristic is maintained by covering the assembly 3 in which the wiring board 2 and the board mounting frame member 4 are combined with the shield case 5 in which the upper case body 6 and the lower case body 7 are directly combined. The

  In the electronic tuner 1, the wiring board 2 is also connected to the wiring board 2 by fitting the fitting protrusions 20 facing the mounting through-holes 12 to the wiring board 2 as described above. The assembly 3 functions as a structure that reinforces the member 4 and has sufficient mechanical strength. In the electronic tuner 1, the structure of the board mounting frame member 4 can be simple, small and thin, and the assembly 3 is assembled by a simple process.

  In the electronic tuner 1, the fitting convex portion 18 formed on the board mounting frame member 4 is fitted into the slit 10 formed on the wiring board 2 as described above, and the upper case body 6 inserts the engaging convex portion 30 into the slit 10. And the fitting projection 18 is engaged with the engagement hole 31 to be assembled to the board mounting frame member 4 so as to cover and combine the upper portion and the outer peripheral portion of the assembly 3. In the electronic tuner 1, the upper case body 6 is assembled to the assembly 3 by a simple process and is easily removed.

  In the electronic tuner 1, as described above, the shield case 5 is directly combined by engaging the engaging convex edge 39 with the engaging beat 32 by a simple process of pushing the lower case body 7 into the upper case body 6. Constitute. In the electronic tuner 1, the board mounting frame member 4 that does not require the mounting portion of the lower case body 7 can be simplified and thinned, and the entire assembly 3 can be covered with the shield case 5 to provide stable shielding characteristics. Is played. In the electronic tuner 1, the shield case 5 is assembled by a simple process and is easily removed.

  In the electronic tuner 1, as described above, the pin terminals 43 and the connection terminals 44 are arranged in a staggered manner in the vertical direction to provide a connector 8 that is reduced in size and increased in number of pins, thereby maintaining a small and thin size. Function and high functionality are achieved. In the electronic tuner 1, the connector 8 mounted on the wiring board 2 is supported by the connector receiving portion 38 formed on the lower case body 7, and the connector caulking convex piece 23 and the front panel member 9 formed on the board mounting frame member 4 are supported. The formed connector caulking convex piece 48 holds it. In the electronic tuner 1, by holding the connector 8 firmly, the occurrence of disconnection of the connection portion during plug insertion / removal operation or the like is reduced.

  In the electronic tuner 1, as described above, the upper case body 6 and the lower case body 7 constituting the shield case 5 include the third upper outer peripheral standing wall portion 27, the fourth upper outer peripheral standing wall portion 28, and the third lower portion. The outer peripheral standing wall portion 36 and the fourth lower outer peripheral standing wall portion 37 are combined by engaging the engaging beat 32 and the engaging convex edge portion 39. In the electronic tuner 1, the upper case body 6 and the lower case body 7 are directly connected to each other at the first upper outer peripheral standing wall portion 25, the second upper outer peripheral standing wall portion 26, the first lower outer peripheral standing wall portion 34, and the second lower outer peripheral standing wall portion 35. Does not have a combined structure.

  The electronic tuner 50 shown as the second embodiment in FIGS. 8 to 10 is more stable while maintaining the above-described small size and thinness on the second side surface facing the first side surface on which the connector 8 is provided. It is characterized by providing a fixing structure that exhibits the shield characteristics. The electronic tuner 50 has the same configuration as the electronic tuner 1 described above except for the fixing structure described later in detail on the second side surface portion. Is omitted.

  Also in the electronic tuner 50, the upper case body 51 and the lower case body 52 are provided with the third upper outer peripheral standing wall portion 27, the fourth upper outer peripheral standing wall portion 28, the third lower outer peripheral standing wall portion 36, and the fourth lower outer peripheral standing wall, respectively. The basic configuration is the same as that in which the portion 37 is directly combined by engaging the engaging beat 32 and the engaging convex edge 39. In the electronic tuner 50, by adopting such a combination structure, the board mounting frame member 53 is also formed thin, so that the overall size and thickness are reduced.

  Also in the electronic tuner 50, the second terminal of the upper case body 51 and the lower case body 52 is provided by providing the connector 8 with the pin terminals 43 and the connection terminals 44 arranged in a staggered manner in the vertical direction to reduce the size and increase the number of pins. Some space in the height direction is secured on the side surface side. In the electronic tuner 50, paying attention to this space, a structure in which the upper case body 51 and the lower case body 52 are combined more firmly while being thinned is provided.

  In the electronic tuner 50, as shown in FIG. 8, the substrate mounting frame member 53 is formed so that only the second side surface portion 54 is slightly wider in the height direction than the other side surface portions. A case engagement beat 55 is integrally formed on the outer surface of the second side surface portion 54 of the board mounting frame member 53. As shown in FIGS. 9 and 10, the case engagement beat 55 is positioned at a substantially central portion in the height direction of the second side surface portion 54 and protrudes outward with a predetermined protrusion amount in an arcuate horizontal direction. It consists of convex parts. As will be described in detail later, engaging convex edge portions 59 and 63 formed on the upper case body 51 and the lower case body 52 are engaged with the case engaging beat 55 together.

  In the upper case body 51, the second upper outer peripheral standing wall portion 56 is bent integrally with the ceiling portion 24 with a height dimension substantially equal to the width of the second side surface portion 54 of the board mounting frame member 53. . As shown in FIGS. 8 and 9, the second upper outer peripheral standing wall portion 56 has a predetermined interval by forming a plurality of notches 57 with a predetermined interval and a predetermined width in the length direction. A plurality of strip-shaped upper standing wall pieces 58 divided into a plurality of strips are formed in a comb-teeth shape. In the second upper outer peripheral standing wall portion 56, each upper standing wall piece 58 is curved in a substantially semicircular arc shape in which the respective front end portions are convex inwardly, whereby the upper engaging convex edge portions 59 are integrally formed. .

  Also in the lower case body 52, the second lower outer peripheral standing wall portion 60 is integrally bent from the bottom plate portion 33 with a height dimension substantially equal to the width of the second side surface portion 54 of the board mounting frame member 53. . As shown in FIGS. 8 and 9, the second lower outer peripheral standing wall portion 60 also has a predetermined interval by forming a plurality of notches 61 with a predetermined interval and a predetermined width in the length direction. A plurality of strip-shaped lower standing wall pieces 62 divided into sections are configured in a comb-teeth shape. In the second lower outer peripheral standing wall portion 60, each lower standing wall piece 62 is bent into a substantially semicircular arc shape with the respective tip portions projecting inward, whereby lower engaging convex edge portions 63 are integrally formed. .

  In the upper case body 51, the upper standing wall pieces 58 are substantially the same width as the lengths of the notches 61 of the lower case body 52, and the same number is formed at the same interval. Also in the lower case body 52, the lower standing wall pieces 62 have the same width as the lengths of the notches 57 of the upper case body 51 and the same number with the same interval. As shown in FIG. 9, the upper case body 51 and the lower case body 52 are located in the notch 61 of the lower case body 52 to which the upper standing wall piece 58 faces, and the upper case body 51 to which the lower standing wall piece 62 faces. They are combined so as to be located in the notch 57. The upper case body 51 and the lower case body 52 are formed in a zigzag shape so that the upper standing wall pieces 58 of the second upper outer peripheral standing wall portion 56 and the lower standing wall pieces 63 of the second lower outer peripheral standing wall portion 60 are formed in a comb-like shape. The shield case 5 is configured in combination.

  Also in the electronic tuner 50, the upper case body 51 and the lower case body 52 are combined with the assembly 3 in which the wiring board 4 and the board mounting frame member 53 are integrated, as in the electronic tuner 1 described above. The shield case 5 is configured by directly combining the above. In the electronic tuner 50, the upper case body 51 and the lower case body 52 are combined via the board mounting frame member 53 in the second side surface portion having the above-described configuration. Since the upper case body 51 and the lower case body 52 have the same combination structure of other parts as that of the electronic tuner 1 described above, the description of the combination operation is omitted.

  In the electronic tuner 50, the upper case protrusion 51 formed on each upper standing wall piece 58 along the second side surface portion 54 of the board mounting frame member 53 by pressing and combining the upper case body 51 with respect to the assembly 3. The part 59 moves downward. As shown in FIGS. 9 and 10, the upper case body 51 climbs over the upper engaging convex edge portion 59 while elastically deforming outward when the upper engaging convex edge portion 59 comes into contact with the case engaging beat 55. The portion 56 is combined with the second side surface portion 54 of the board mounting frame member 53.

  Also in the electronic tuner 50, the lower case body 52 is pushed into the upper case body 51 combined with the assembly 3 to perform the combination. In the lower case body 52, the lower engaging convex edge portions 63 formed on the respective lower standing wall pieces 62 move upward along the second side surface portion 54 of the board mounting frame member 53. The lower case body 52, when the lower engagement convex edge portion 63 hits the case engagement beat 55, moves over the outer case while elastically deforming outward, as shown in FIG. 9 and FIG. The portion 60 is combined with the second side surface portion 54 of the board mounting frame member 53.

  In the electronic tuner 50, as shown in FIG. 9, the upper standing wall pieces 58 of the upper case body 51 and the lower standing wall pieces 62 of the lower case body 52 are staggered with respect to the case engaging beat 55 of the board mounting frame member 53. Are engaged so that they are alternately sandwiched from above and below. In the electronic tuner 50, since one case engagement beat 55 formed on the board mounting frame member 53 constitutes a combination means of the upper case body 51 and the lower case body 52, the height of the board mounting frame member 53 is increased. Suppressing and maintaining thinness. In the electronic tuner 50, the case engaging beat 55 is engaged with the upper standing wall piece 58 and the lower standing wall piece 62 sandwiched from above and below, so that a shield case structure that is combined more firmly is configured. It becomes like this.

  Note that the present invention is not limited to the electronic tuner shown in the above-described embodiment, but can be applied to a thin circuit module device in which a control board and the like are built in a shield case and various electronic devices. .

It is sectional drawing of the electronic tuner shown as embodiment of this invention. It is a principal part disassembled perspective view of an electronic tuner. It is a principal part disassembled perspective view explaining the combined structure of the upper case body, board | substrate attachment frame member, and wiring board in an electronic tuner. It is principal part sectional drawing of an electronic tuner. It is a principal part exploded perspective view explaining the combination structure of the upper case body and lower case in an electronic tuner. It is a principal part disassembled perspective view of the upper case body and lower case in an electronic tuner. It is a side view of the connector mounting part of an electronic tuner. It is a principal part disassembled perspective view of the electronic tuner shown as other embodiment. It is a principal part side view of an electronic tuner. It is principal part sectional drawing of an electronic tuner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic tuner 2 Wiring board 3 Assembly 4 Board attachment frame member 5 Shield case 6 Upper case body 7 Lower case body 8 Connector 9 Front panel member 10 Slit 11 Connector assembly part 12 Mounting through-hole 13 1st side part 14 2nd Side surface portion 15 Third side surface portion 16 Fourth side surface portion 17 Beam portion 18 Fitting convex portion 19 Fitting convex piece 20 Fitting convex portion 24 Ceiling portion 25 First upper outer peripheral standing wall portion 26 Second upper outer peripheral standing wall portion 27 Third Upper outer peripheral standing wall part 28 Fourth upper outer peripheral standing wall part 29 Upper pressing piece 30 Engaging convex part 31 Engaging hole 32 Engaging beat 33 Bottom plate part 34 First lower outer peripheral standing wall part 35 Second lower outer peripheral standing wall part 36 Third lower outer peripheral part Standing wall portion 37 Fourth lower outer peripheral standing wall portion 38 Connector receiving portion 39 Engaging convex edge portion 40 Lower pressing piece 41 Housing 43 Pin terminal 44 Connection terminal 50 Electronic tuner 51 Upper Case Body 52 Lower Case Body 53 Substrate Mounting Frame Member 54 Second Side Part 55 Case Engagement Beat 56 Second Upper Outer Standing Wall 57 Notch 58 Upper Standing Wall Fragment 59 Upper Engaging Edge 60 60 Second Lower Outer Standing Wall Part 61 Notch 62 Lower vertical wall piece 63 Lower engaging convex edge part

Claims (8)

A wiring board in which a plurality of mounting through holes are formed;
A plurality of fitting projections facing each of the mounting through-holes are formed, and a plurality of engaging projections are formed on the outer peripheral portion by projecting the tip outward and cut and raised. A board mounting frame member that is integrated with the wiring board to form an assembly by fitting into the respective mounting through-holes facing each other;
The upper part of the assembly includes a ceiling part and an outer peripheral standing wall covering the outer peripheral part, and a plurality of engaging holes are formed in the outer peripheral standing wall part to face the engaging convex pieces of the board mounting frame member. A plurality of engagement beats are formed on the outer surface, and an upper case body that is maintained in a combined state with the assembly by engaging the engagement convex pieces facing the engagement holes,
A bottom plate portion and an outer peripheral standing wall portion covering the bottom plate portion and the outer peripheral portion of the assembly, and a plurality of engaging convex portions facing the engaging beat of the upper case body are formed on the outer peripheral standing wall portion, An electronic apparatus comprising: a lower case body combined with the upper case body by fitting the engaging convex portions to the opposing engagement beats.   The electronic device according to claim 1, wherein the upper case body and the lower case body are formed of a thin metal plate material and constitute a shield case that covers the assembly.   The board mounting frame member is formed of a thin metal plate into a substantially frame shape having substantially the same outer dimensions as the wiring board, and the tips of the fitting protrusions fitted in the mounting through holes are 3. The electronic apparatus according to claim 1, wherein the assembly is configured by being integrated with the wiring board by soldering. 4. The upper case body forms the engagement beats on the outer surfaces of a plurality of strip-like engagement wall portions divided by forming a plurality of division grooves in the height direction on the outer peripheral standing wall portion,
The lower case body is formed by a plurality of strip-like engagement wall portions that are divided by forming a plurality of division grooves in the height direction at intervals smaller than the intervals between the division grooves of the upper case body on the outer peripheral standing wall portion. Configure the engaging projection,
4. The combination of the upper case body and the lower case body is performed by the engagement protrusions adjacent to the engagement beat being engaged across the engagement beats. The electronic device of Claim 1.   The wiring board is protruded outward from at least one side of a guide opening formed in an outer peripheral standing wall portion of the lower case body, and a multi-pin connector is mounted on the protruding portion. The electronic device according to any one of claims 1 to 4. On the bottom plate portion of the lower case body, a connector receiving portion protruding outward corresponding to the guide opening is integrally formed,
6. The electronic apparatus according to claim 5, wherein the connector receiving portion supports a bottom surface side of the multi-pin connector mounted on the wiring board.   The multi-pin connector is characterized in that a large number of pin terminals are arranged in two upper and lower stages, and the upper pin terminals and the lower pin terminals facing each other are shifted in the horizontal direction and arranged in a staggered manner. The electronic device of any one of Claim 5 or Claim 6. A combined structure in which the upper case body and the lower case body are fitted to case engagement beats and engagement protrusions formed on the outer peripheral standing wall portion at the opposite side surface portions adjacent to the side surface portions where the guide opening portions are formed. As well as
In the side surface portion that faces the guide opening portion, each outer peripheral standing wall portion is formed with an engaging convex portion that is comb-like and combined in a staggered manner, and these engaging convex portions are formed on the substrate mounting frame member. The electronic device according to any one of claims 5 to 7, wherein a case engagement beat formed on an outer surface is engaged and combined so as to be sandwiched from above and below.

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